378816312566 has 8 divisors (see below), whose sum is σ = 583581887040. Its totient is φ = 184289016888.

The previous prime is 378816312547. The next prime is 378816312569. The reversal of 378816312566 is 665213618873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×378816312566² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378816312569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2559569606 + ... + 2559569753.

It is an arithmetic number, because the mean of its divisors is an integer number (72947735880).

Almost surely, 2^378816312566 is an apocalyptic number.

378816312566 is a deficient number, since it is larger than the sum of its proper divisors (204765574474).

378816312566 is a wasteful number, since it uses less digits than its factorization.

378816312566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119139398.

The product of its digits is 8709120, while the sum is 56.

The spelling of 378816312566 in words is "three hundred seventy-eight billion, eight hundred sixteen million, three hundred twelve thousand, five hundred sixty-six".